D Practice for Outdoor Weathering of Plastics3 4 Discontinued; see Annual Book of ASTM Standards, Vol 5 Annual Book of. astm d 塑料的室外风化 – Designation: D – 99 Standard Practice for Outdoor Weathering of Pl. Find the most up-to-date version of ASTM D at Engineering
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Several years of repeat exposures are needed to get an average test result for a given location. Note 2 — This standard and ISO Your Alert Profile lists the documents that will be monitored.
The insulators provide inert mounting while the slotted plate permits free circulation of air behind the specimen. NOTE 6—Sand as a ground cover xstm be desirable where the abrasive effects of exposure to wind-blown sand is a part of the desired exposure.
These are dependent on the ASTM test methods for the speci? Current edition approved Nov. Table ast, shows typical UV radiant exposures for 12 months in subtropical and desert climates. This procedure will vary with materials, but it d14335 be uniform in a series of tests on one material c1435 provide comparative results. Seasonal effects are averaged in exposures of several years. It is convenient to group specimens to be removed from exposure at the same time in one holder. The exposure aperture of each frame shall be of sufficient size to expose the entire test area of each specimen when sufficient specimens are contained.
Need more than one copy? It cannot be assumed, therefore, that results from one exposure in a single location will be useful for determining relative durability in a different location. The specimens are mounted in the grooves of the insulators at a?
Climatological variations within these areas may include those represented by desert, seashore salt airindustrial locations, tropical, and subtropical regions, plus areas exhibiting a wide range in solar radiant energy. The relative durability of plastics in outdoor use can be very different depending on the location of the exposure because of differences in ultraviolet UV radiation, time of wetness, temperature, pollutants, and other factors.
Fasteners used to attach specimens to the test rack shall provide for secure attachment but allow specimens to expand or contract with thermal changes, moisture absorption or desorption, or plasticizer loss.
The ground cover should be low-cut grass in most temperate, tropical, and subtropical areas. Exposures in several locations with different climates that represent a broad range of anticipated service conditions are recommended. We have no amendments or corrections for this standard. Precision and Bias Note 1 — See Practice G24 for aging under glass. The structural members of the test racks shall not constitute a backing to the specimens under test. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Link to Active This link will always route to the current Active version of the standard. Exposure test specimens should be large enough that mounting edges may be removed where evaluation test results would otherwise be affected. They shall be covered with inert wrapping to exclude light exposure during the exposure period.
Last previous edition D — It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Add to Alert PDF. This method of mounting is shown in Fig. It is intended for use with? NOTE 4—At-latitude exposure provides maximum annual total solarradiant exposure at most non-subtropical sites. The results of tests conducted for less than twelve months will depend on the particular season of the year in which they begin.
All materials of an unknown end use application will normally be run in an 5.
ASTM D – 13 – Standard Practice for Outdoor Weathering of Plastics
The exposure stages must be regarded as providing only a general indication of the degree of exposure, and the results should always be considered in terms of characteristics of the exposure site as well. They may be specimens suited to the means of evaluating the effects of weathering on a speci? If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
NOTE 8—The results for exposure stages of less than one year will depend on the season of the year in which the exposure was made. Standards Subscriptions from ANSI provides a aastm, multi-user solution for accessing standards. Please first log in with a verified email before subscribing to alerts. An inherent limitation in solar-radiation measurements is that they do not re?
Preferably, mark both specimen and specimen holder on the side not exposed to weather, as advanced weathering can obscure even deeply scribed marks. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. You may delete a document from your Alert Profile at any time.
Several years of repeat exposures are needed to get an average test result for a given location. As the voice of the U.
ASTM D1435 – 13
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A superscript epsilon e indicates an editorial change since the last revision or reapproval. Please first verify your email before subscribing to alerts. Historical Version s – view previous versions of standard.